Microstructural characterization of martensite with long period stacking order structure in Hf-Co-Pd alloy

Mitsuhiro Matsuda, Ryo Matsuoka, Minoru Nishida, Masatoshi Mitsuhara

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Abstract

Microstructural characterization of martensite with long period stacking order (LPSO) structure in a Hf-Co-Pd alloy was investigated by transmission electron microscopy (TEM) and high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM). LPSO structure with six stacking sequences; 6O (orthorhombic) (Space group: Immm), were newly discovered. Based on the electron diffraction experiments, the lattice parameters of LPSO phase were estimated to be a = 0.33 nm, b = 0.45nm and c = 1.53 nm. The formation mechanism of martensite with LPSO structure and the crystallographic orientation relationship between parent B2 phase and 6O martensite are also discussed.

Original languageEnglish
Pages (from-to)27-32
Number of pages6
JournalMaterials Transactions
Volume61
Issue number1
DOIs
Publication statusPublished - Jan 1 2020

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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